.banner{
    width: 100%;
    height: 270px;
    background:url(../img/activity1.jpg) no-repeat;
    background-position: center;
    background-size: cover;
    margin-top: 100px;
    position: relative;

}
.banner .obstacle{
    width: 100%;
    height: 100%;
    position: absolute;
    top: 0;
    left: 0;
    background-color: rgba(0,0,0,0);
    transition: all .5s ease-in-out;
}
.banner:hover .obstacle{
background-color: rgba(0, 0, 0, 0.5);
}
.main{
    width: 100%;
    height: 922px;
    position: relative;

}
.main-c{
    width: 100%;
    height: 922px;
    margin: 0 auto;

}

.title{
    text-align: center;
    height: 61px;
    margin-top: 100px;

}
.tltle .ch{
    height: 36px;

    line-height: 36px;
    color: #444444;

}
.title .ch p{
    font-size: 26px;
}
.title .en{
font-size: 16px;
height: 16px;
line-height: 16px;
color: #c1c1c1;
margin-top: 10px;
}


.content{
    height: 600px;
    width: 100%;
    margin-top: 50px;

}
.content li{
    height: 200px;
    width: 100%;
    transition: all .3s ease-in;
    border: 1px solid #dbdbdb;
}
.center{
    width: 800px;
    height: 200px;
    margin: 0 auto;
    position: relative;

}
.content li .date{
text-align: right;
width: 180px;
height: 150px;
float: left;
margin-top: 50px;
}
.content li .date .day{

        font-size:60px;
        color: #929292;
        /* height: 45px; */

}
.content li .date .year{
        /* height: 16px; */
        font-size: 16px;
        color: #929292;
}
.content li .subject{
    text-align: left;
    width: 550px;
    height: 120px;
    float: left;
    /* margin-top:57px ; */
    margin-left: 50px;
    margin-top: 60px;
}
.content li .subject .sup{
    font-size: 16px;
    color: #000;
    height: 18px;
}
.content li .subject .sub{
    font-size: 12px;
    color: #000;
    line-height: 17px;
    margin-top:28px ;
}
.content li .arr-r{
    position: absolute;
    top: 50%;
    right:-100px ;

    margin-top:-13px ;
    opacity: 0;
    transition: all .4s ease-in;
}
.content li:hover .arr-r{
    opacity: 1;
}
.content li:hover{
    background-color: #444;

}
.content li:hover .center .year{
    color: #fff;
}
.content li:hover .day{
    color: #fff;
}
.content li:hover .sup{
    color: #fff;
}
.content li:hover .sub{
  color: #fff;
}
.main .but{
    position: absolute;
    bottom:60px;
    left: 50%;
    transform: translateX(50%);
}
.main .but .but1{
    width: 30px;
    height: 30px;
    float: left;
    color: #fff;
    background-color: #6d6d6d;
    text-align: center;
    line-height: 30px;
    margin: 0px 5px;
}
.main .but .but2{
    width: 30px;
    height: 30px;
    float: left;
    color: #929292;
    text-align: center;
    line-height: 30px;
    margin: 0px 5px;
    transition: all .3s ease;
}
.main .but .but2:hover{
    color: #fff;
    background-color: #6d6d6d;  
}
.main .but .but2:active{
    color: #fff;
    background-color: #6d6d6d;
}
